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November 18, 2022 Sienna Resources Inc. (“Sienna” or the “Company”) (SIE—TSX.v, SNNAF—USA, A1XCQ0–Germany) wishes to announce that it has hired internationally respected Abitibi Geophysics of Quebec to conduct an AeroVision Survey on the  Marathon North Platinum-Palladium Property in Northern Ontario directly bordering Generation Mining Ltd.  Management cautions that past results or discoveries on properties in proximity to Sienna may not necessarily be indicative to the presence of mineralization on the company’s properties.

Jason Gigliotti, President of Sienna Resources Inc states, “We are pleased to continue to do work on the Marathon North Property.  As we are starting operations in Ontario, we are also focused on our Nevada Lithium Projects.  We expect to be very active in Nevada in 2023 and look forward to an active period of growth in the short term on Sienna.”

Recently, the Bureau of Land Management (BLM) has given Sienna approval for up to 4 additional holes to be completed on the 100% owned Blue Clay Lithium Project in Clayton Valley, Nevada (See map below).   On March 25, 2022, Sienna revealed a new lithium discovery on the 100% owned Blue Clay Lithium Project in Clayton Valley, Nevada. Lithium values as high as 1230 ppm Li were encountered.  The Blue Clay Lithium Project consists of 150 contiguous claims totaling approximately 2,950 acres prospective for lithium right in the heart of the Clayton Valley in Nevada, which is currently  home to the only producing lithium region in North America.

Clayton Valley Map

About Sienna Resources Inc.

Sienna Resources is focused on exploring for and developing high-grade battery metals deposits in politically stable, environmentally responsible and ethical mining jurisdictions. Sienna’s projects include the Marathon North platinum-palladium property in Northern Ontario directly bordering Generation Mining Ltd.’s Marathon deposit. Sienna also has the Clayton Valley Deep Basin Lithium Project in Clayton Valley, Nev., home to the only lithium brine basin in production in North America, in the direct vicinity of Albemarle Corp.’s Silver Peak deposit and Tesla Motors Inc.’s Gigafactory and the recently acquired Blue Clay Lithium Project in Clayton Valley Nevada where the Company has made an initial lithium discovery.  Management cautions that past results or discoveries on properties in proximity to Sienna may not necessarily be indicative to the presence of mineralization on the company’s properties.

Qualified Person

Mr. Frank Bain, PGeo, a qualified person as defined by National Instrument 43-101 has reviewed and approved the scientific and technical disclosure contained within this news release.

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Contact Information

Tel:  1.604.646.6900

Fax: 1.604.689.1733

www.siennaresources.com

[email protected]

“Jason Gigliotti”

President, Director

Sienna Resources Inc.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this press release.